MIC3003GML datasheet(52/75 Pages) MICREL

52 / 75 page

Micrel, Inc.

MIC3003

November 2009

M9999-111209-C

hbwhelp@micrel.com or (408) 955-1690

Extended Control and Status (ECNTRL)

D[7]

reserved

D[6]

reserved

D[5]

reserved

D[4]

reserved

D[3]

SRS1

read/write

D[2]

reserved

D[1]

PLOS

read/write

D[0]

PLS

read/write

Default Value

0000 0000b = 00h

Serial Address

A2h

Byte Address

118 = 76h

Bit(s)

Function

Operation

D[7-4]

Reserved

Reserved—always read as zeros

D[3]

SRS1

Soft rate select (RS1)

Assert the TRSOUT pin in Rate

Select/Extended Rate Select Emulation

Mode

D[2]

Reserved

Reserved—always reads as zero

D[1]

PLOS

Power Level Operation State

D[0]

PLS

Power Level Select

These two bits are read/write but change

no functionality of the MIC3003

OEM Password Entry (OEMPW)

D[7]

read/write

D[6]

read/write

D[5]

read/write

D[4]

read/write

D[3]

read/write

D[2]

read/write

D[1]

read/write

D[0]

read/write

Default value for all four bytes

0000 0000b = 00h (reset to zero at power-on)

Serial address

A2h

Byte addresses

If OEMCFG5-2 = 0: 120 – 123 = 78h – 7Bh

If OEMCFG5-2 = 1: 123 – 126 = 7Bh – 7Eh

This four-byte field is for entry of the password required to access the OEM area of the MIC3003’s memory and registers. A

valid OEM password will also permit access to the user areas of memory. This field is compared to the four-byte OEMPWSET

field at serial address A6h, bytes 12 - 15 (0Ch – 0Fh). If the two fields match, access is allowed to the OEM areas of the

MIC3003 non-volatile memory at serial addresses A4h and A6h. The OEM password is set by writing the new value into

OEMPWSET. The password comparison is performed following the write to the highest address byte of OEMPW, address 7Bh

if OEMCFG5 bit 2 is low, or 7Eh if OEMCFG5 bit 2 is high. This byte must be written last.

A four-byte burst-write sequence to OEMPW may be used as this will result in the highest address byte being written last.

OEMPW is reset to zero at power on. Any values written to OEMPW will be readable by the host regardless of the

locked/unlocked status of the device. If OEMPWSET is set to zero (00000000h), the MIC3003 will remain unlocked regardless

of the contents of the OEMPW field. This is the factory default security setting.

Byte

Weight

OEM Password Entry, Most Significant Byte (Address = 7Bh resp. 7Eh)

OEM Password Entry, 2nd Most Significant Byte (Address = 7Ah resp. 7Dh)

OEM Password Entry, 2nd Least Significant Byte (Address = 79h resp. 7Ch)

OEM Password Entry, Least Significant Byte (Address = 78h resp. 7Bh)

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